21770810996 has 24 divisors (see below), whose sum is σ = 41583924480. Its totient is φ = 9890712000.

The previous prime is 21770810993. The next prime is 21770811019. The reversal of 21770810996 is 69901807712.

It is a super-2 number, since 2×21770810996² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21770810993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40961 + ... + 212648.

It is an arithmetic number, because the mean of its divisors is an integer number (1732663520).

Almost surely, 2^21770810996 is an apocalyptic number.

It is an amenable number.

21770810996 is a deficient number, since it is larger than the sum of its proper divisors (19813113484).

21770810996 is a wasteful number, since it uses less digits than its factorization.

21770810996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255575 (or 255573 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 50.

The spelling of 21770810996 in words is "twenty-one billion, seven hundred seventy million, eight hundred ten thousand, nine hundred ninety-six".